As per reports, weather conditions in Toronto and the Greater Toronto Area are forecast to shift significantly between Friday (17 April), and Monday (20 April), with storms followed by a notable temperature decline.

• On Friday (17 April), conditions are expected to remain calm and mild, with daytime maximum temperatures reaching approximately 18 degrees Celsius at 1400 hours local time (1800 hours UTC), along with patchy morning fog and sunny intervals.
• Overnight into Saturday (18 April), temperatures are forecast to remain relatively mild, with minimum temperatures near 10 degrees Celsius at 0500 hours local time (0900 hours UTC).
• Rainfall totals between 10 millimetres and 15 millimetres are expected across Toronto and the Greater Toronto Area on Saturday (19 April), with temperatures reaching approximately 18 degrees Celsius before dropping sharply overnight to around three degrees Celsius by 2300 hours local time (0300 hours UTC on 19 April).
• A significant weather shift is expected on Sunday (19 April), as cold northwesterly winds move into the region, bringing daytime maximum temperatures of approximately seven degrees Celsius at around 1400 hours local time (1800 hours UTC) and overnight minimum temperatures of negative two degrees Celsius.
• Conditions on Sunday (19 April), is forecast to include a mix of sunny intervals and scattered rainfall.
• Cooler conditions are forecast to persist into Monday (20 April), with maximum temperatures near five degrees Celsius and minimum temperatures around negative one degree Celsius, indicating a continuation of below normal temperatures across the region.